If you drag a stack of 1 coal to a stack of coal you lose coal. Needs more testing to see what happens if a stack of more than 1 coal is shift dug to a stack if it still happens.
from burner to inventory: won’t let you drag stack, won’t let you drag stack to a existing stack. You have to drag single coal/metal/hazium from burner to inventory.
within inventory: dragging individual coal/metal/hazium in a stack loses a unit every time to be able to use/stack coal/metal/hazium bars you drag individually out of a burner you have to drop them on the ground atleast a tile away from eachother and then pickup into a stack. If you don’t do this it does not recognize unit as in inventory and you cannot use it. Additionally the first unit you pickup seems to be a ghost unit and when you pick up the second you still only have 1 in inventory. The rest add up as normal.
I'm happy to report that this has been fixed for 0.9.22.5 This fix also resolves several more issues with item handling.
Is this within an inventory or a container or a burner? I need much more info to diagnose this
Happens with metal and a forge too.